EP 0027719 A1 19810429 - Thermosetting coating composition.
Title (en)
Thermosetting coating composition.
Title (de)
Hitzehärtende Überzugszusammensetzung.
Title (fr)
Composition de revêtement durcissant à la chaleur.
Publication
Application
Priority
US 8557079 A 19791017
Abstract (en)
[origin: US4297448A] A thermosetting coating composition which may have nonvolatile solids content as high as 60% or greater and which may be employed as an automotive topcoat. The composition, exclusive of pigments, solvent, reactive and non-reactive diluents and other non-reactive components, consists essentially of: (A) A binder composition consisting essentially of: (1) Between about 30 and about 75 weight percent of one or more low viscosity resins selected from hydroxy functional acrylic polymers, hydroxy functional polyethers and hydroxy functional polyesters, each of which (i) is substantially soluble in the solvent of the composition and (ii) has a number average molecular weight of between about 1000 and about 2500; and (2) Between about 70 and about 25 weight percent of one or more crosslinked dispersion polymers each of which is substantially insoluble in the solvent of the composition; and (B) An aminoplast crosslinking agent in an amount of between about 5 and about 40 parts per 100 parts of said binder composition. The crosslinked dispersion polymer is prepared by free radical polymerization of 0.5 to 3.5 weight percent of di-,tri- or tetravinyl monomers and 99.5 to 96.5 weight percent of at least one other copolymerizable monoethylenically unsaturated monomer, in the presence of (i) hydrocarbon dispersing liquid which is a solvent for the polymerizable monomer, but a non-solvent for the resulting crosslinked polymer, and (ii) polymeric dispersion stabilizer which is solvated by said dispersing liquid and associated with said crosslinked polymer so as to maintain a separation between particles thereof, thereby inhibiting coagulation of said particles, wherein polymerization is carried out at elevated temperature such that the dispersion polymer first forms and then is crosslinked.
IPC 1-7
IPC 8 full level
C08F 291/00 (2006.01); C08K 5/3492 (2006.01); C08L 51/00 (2006.01); C08L 101/00 (2006.01); C09D 5/00 (2006.01); C09D 133/06 (2006.01); C09D 161/20 (2006.01); C09D 201/00 (2006.01); C09D 201/06 (2006.01); C09D 201/08 (2006.01); C08L 57/00 (2006.01); C08L 61/20 (2006.01)
CPC (source: EP US)
C08K 5/3492 (2013.01 - EP US); C09D 133/066 (2013.01 - EP US); C09D 161/20 (2013.01 - EP US); C08L 57/00 (2013.01 - EP US); C08L 61/20 (2013.01 - EP US); C08L 2205/18 (2013.01 - EP US); Y10T 428/31678 (2015.04 - EP US)
Citation (search report)
- DE 2350654 A1 19740425 - PPG INDUSTRIES INC
- GB 1388381 A 19750326 - ICI LTD
- DE 2314983 A1 19731018 - FORD WERKE AG
- AT 327347 B 19760126 - ICI LTD [GB]
- DE 2209889 B2 19770630
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0027719 A1 19810429; EP 0027719 B1 19830713; CA 1154193 A 19830920; DE 3064147 D1 19830818; JP S5662855 A 19810529; JP S6347755 B2 19880926; US 4297448 A 19811027
DOCDB simple family (application)
EP 80303650 A 19801016; CA 359189 A 19800828; DE 3064147 T 19801016; JP 14424780 A 19801015; US 8557079 A 19791017